In an equilateral triangle, all three side lengths are equal. Suppose you know that the perimeter of equilateral triangle ABC is (18x - 9) meters. Determine which of the given side lengths, if any, represent the side lengths of equilateral triangle ABC. Explain why or why not. (a) (6x - 3) meters (b) (x - 3) meters (c) 3 (2x - 1) meter

Question

Dominique Ingram

27 September, 15:48

+5

Answers (2)

Know the Answer?

Justine Fry · Answer 1

All sides are equal legnth

3 sides so

if one side is legnth, y

the perimiter is 3y

3y=18x-9

divide both sides by 3

y=6x-3

A is answer

Tomas Palmer · Answer 2

It's A because the 18x/3 = 6x, and A is the only option with 6x present